STRONGLY CLEAN ELEMENTS OF A SKEW MONOID RING
STRONGLY CLEAN ELEMENTS OF A SKEW MONOID RING
Let R be an associative ring with an endomorphism σ and F ∪ {0} the free monoid generated by U = {u1, . . . , ut} with 0 added, and M a factor of F setting certain monomial in U to 0, enough so that, for some n, Mn …